Trigon theme

A modern, elegant and versatile theme for Beamer.

![Demo]demo-shield ![Documentation]docs-shield

Trigon found its origin and inspiration in the graphical guidelines resulting from the visual identity overhaul of the University of Liège. Although directly inspired from these guidelines, the theme was stripped out of any mention or specificities related the University and its faculties. This makes the Trigon theme perfectly suitable for many different contexts.

The final product provides a modern, elegant and versatile theme with a high degree of customization. The main design focuses on triangular shapes for major layout elements and noise minimization for the main body of the work.

The theme is available on CTAN and a demo template is publicly available on the Overleaf Gallery.

Feature requests, issues and pull requests are welcome.

Features

• Multiple style variations for title, section and regular slides
• Dark theme
• Many convenient options (numbering style, toggle section slides, title font changes,...)
• Looks better on 16:9 format, but supports 4:3 as well
• Lightweight (does not require lots of additional packages)
• Similar options than with Metropolis theme

Note

• This theme works best using the sourcesanspro font package, which is loaded by default. As some users may not want to load additional packages or want to use other fonts, the package can be disabled using the option usesourcefonts=false.

Screenshots

Installation

To install a stable version of this theme, please refer to update instructions of your TeX distribution. Trigon has been on CTAN since March 2021. For users of typical TeX distributions (TexLive, MacTeX, MikTeX), simply updating your package list should install Trigon on your system.

If you want to use the cutting-edge development version of Trigon, you can install it manually by following these steps:

1. Download the source using a git clone of the Trigon repository or as a zip archive
2. Compile the style files by running make sty inside the downloaded directory. (Or run LaTeX directly on source/trigontheme.ins.)
3. Move the resulting .sty files to the folder containing your presentation. To use Trigon with many presentations, run make install or move the *.sty files to a folder in your TeX path instead.
4. Use the theme by declaring \usetheme{trigon} in the preamble of your document.

Overleaf

The version of Trigon available on Overleaf may not be the latest one. Overleaf relies on Texlive for its backend latex installation, which they update once a year (typically around end of Q3). Depending on the time of the year, it is therefore possible that some of the latest features and developments are not available on Overleaf.

Note that you can see the current version of all packages by using \listfiles in the preamble of the document and looking at the logs of the compilation.

Moreover, to avoid breaking changes, documents created with one version of TexLive keep this same version when they are edited. To use a more recent version of Trigon in your older documents, you need to instruct Overleaf to use the most recent TexLive Keep in mind that this may cause issues with other packages used in your presentation that would be updated as well.

If you still want to use the very latest development, it is best to download the source code of the package here or over CTAN, compile the .sty files locally and place them at the root of you project on CTAN.

A template project was created and is publicly available in the Overleaf Gallery to bootstrap your presentation.

Usage

See the package documentation for a detailed view of the package options.

Contributing

All contributions to this theme are welcomed, whereas in the form of issue report, feature requests or pull requests.

If you want to propose an interesting alternative layout for this theme (for the title, section or regular slides), please make sure to respect the following criteria:

• Maximum three main triangles on the layout
• Blending type "multiply" for overlapping triangles
• Triangles must all be equilateral (60° angles), some useful macros are defined in beamerinnerthemettrigon.dtx for that

References & Acknowledgment

• The theme structure and options are heavily based on the Metropolis theme
• The picture used on the title page of the demo is "Man in Red Jacket Standing on the Stairs": Photo by Taryn Elliott from Pexels.

License

Copyright 2021-2023 by Thomas Lambert <trigon@thl.ovh>.

Author and maintainer: Thomas Lambert.

This theme is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License, which is essentially a free software license. Do not hesitate to copy and modify the code to fit your needs.

Some parts of this repository may be released under a different license than the main theme. See the NOTICE.md file for more details.